Electrofluid-pressure brake.



W. V. TURNER.

ELECTROFLUID PRESSURE BRAKEJ APPLICATION HLED, FEB-23.19%.

1,286,842. Patented Dec. 3, 1918.

INVENTOR Waltebv' lbhner adapted to be engaged thorns a teas ro warrenv. rununa, or wrmrmsnune, rnnns rrvaura, assreuou TO THE wns'rine- HQUSEAIR BRAKE COMPANY, OF W'ILMEEDING, PENNSYLVANIA,-A CORPORATIONPENNSYLVANIA.

ELEGTEOFLUID-PRESSURE BRAKE.

Application filed February 23, 1918, Serial No. 218,745,

To all who/1t it may concern Be it known that I, WALTER V. Tunxnn, acitizen of the United States, residing at VVil kinsburg, in the countyof Allegheny and State of Pennsylvania, have invented new and usefulImprovements in Electrofiuid- Pressure Brakes, of which the following isa specification. v

This invention relates to electro-fiuid-pressure brakes, and theprincipal object of the invention is to reduce the number of traincircuits required, by providing means for controlling both theapplication and the re lease of the brakes through common traincircuits.

In the accompanying drawing, the single figure is a diagrammatic view,partly in section, of an electro-fluid pressure brake apparatusembodying my invention.

According to the construction shown in the drawing, a triple valvedevice 1 may be provided comprising a casing having a pis ton chamber 2connected to the brake pipe 3 and containing piston 4, and having avalve chamber 5 connected to auxiliary reservoir i t}, and containing amain slide valve 7 and an *tluxiliary valve 8 adaptedto be operated bylpiston 4.

A r lease valve 9 controls communication from he brake cylinder 10 toexhaust port 11 and magnet 12 is provided for operating aid valve. Anapplication magnet 13 is dapted to operate a valve 14 for venting fluidfrom piston chamber 2 through passage 15 to a passage 16 leading tobrake cylinder 10.

According to my invention, a polarized relay magnet. device 17 isprovided having an armature 18 carrying at one end contacts 19 and 20,and at the opposite end contacts 21 and 22.

Two train wires 23 and 24 are provided one of which may be dispensedwith if a ground return is employed, and the relay -.j,-tuagnet isconnected in circuit acrossthe train. wires. The train wire 24 isconnected to a contact 25 adapted to be engaged by contact 20 andtrainwire 23 is connected to contact 26 and adapted to be engaged by contact22. v v

A contact 27 connected to wire 28 leading to one terminal of releasemagnet 12, is by contact 19, and contact 29, connected to wire 30leading to one terminal of application magnet 13, is adapted to beengaged bycon'tact 21.

0n the head Specification. of Letters Patent. Patented 3, 3; 1918,

car or locomotive, means are provided for reversing the direction ofcurrent flow in the train wires 23'and 24, and in operation, if itisdesircd to efi'ectran'a iphcation of the brakes electrically, currentis caused to flow in a direction for energizing the relay magnet 17 sothat the armature 18 will be thrown to the position shown in thedrawing. In this position, the circuit is completed through theapplication magnet 13 from train wire 23 through magnet 13 to wire 30,through engaging contacts 29 and 21 to armature 18 and thence throughengaging contacts 20 and 25 to train wire 24.

When application magnet 13 is energized,

the valve 14 is opened to vent fluidfrom piston chamber 2 throughpassage 15 to passage 16 leading to brake cylinder 10, and the triplevalve piston 4 is then actuated to shift the valves 7 and 8 in the usualmanner, so as to supply fluid from the auxiliary reservoir 6 to thebrake cylinder 10.

In order to hold the brakes applied, the direction of flow of currentin'the train wires 23 and 24 is reversed, so that the relay magnet isenergized to shift the armature 18 to the position opposite that shown.in the drawing, in which the circuit of the application magnet 13 isopened, while the circuit of the magnet 12 is closed by way of trainwire 23 through magnet 12 to wire 28 and thence through engaged contacts27 and 19 to armature 18 and through engaged contacts 22 and 26 to trainwire 24.

The magnet 12 being thus energized, the valve 9 is operated to cut of?passage 31 from exhaust port 11.

The application magnet being dei nergized, the valve 14 will be closed,so as to cut oil the further venting of fluid from piston chamber 2, andsince the brake pipe 3 will be recharged from the head end of the trainor the usual manner, the piston chamber 2 is also recharged, and thetriple valve parts will be shifted to release position, in which brakecylinder passage 16 is connected by cavity 32 in valve 7 with passage31. Since the release valve 9 is now therefore he held applied.

v ters Patent, is

If it' is desired to release the brakes, the iiow of current is cut offfrom the train .vires 23 and 24, so that the release magnet 12 isde'e'nergized and the valve 9 opened to permit fluid in the brakecylinder to and a release magnet, of a train line for supplying currentto both magnetsand means operated by flow of current through the trainline in one direction for connectingone magnet to the train line and byflow in the reverse direction for connecting: the other magnet to saidtrairifhne.

2. In an eleet1'rdfiuid-P11 lirebrake, the combination with anapplicationmagnet and a release magnet. of av train wire and means forconnecting one or the other of said magnets to the train wire accordingto the direction of 'current flow throu h said train wire.

3. In an electro-fiuid-pressuro brake, the

combination with a brake t.- vlinder. an application magnet adapted uponcnergization to effect an application ot the brakes. and a,

release magnet adapted upon cllclgizatitm to close the exhaust from thebrake crim der, of a train wire and means for connecting one or theother of said magnets to said train wire according to the direction offlow of current through the train wire.

4. In an electro-fluid-pressure brake, the combination with a magnet forcontrolling the application of the brakes and a magnet foreontrollingthe release of the brakes, of a train wire and :1V polarizedrelay magnet device energized according to the direction of current flowthrough said train wire for connecting one or the other of said magnetsto the train wire.

In an electro-flind-pressure brake, the combination with a brakecylinder. a triple *alve device for controlling the admission andrelease of fluid under n'essure to and from the brake cylinder. a magnetvalve device for venting: fluid from the triple valve device to effectan application oi the brakes. and a release valve device for controlling the exhaust of Fluid from the brake cylinder. of: a train wireand a polarirled relay magnet device for connecting one magnet valvedevice to the train wire upon flow of current through the train wire inone direction and for connecting the other magnet valve device to thetrain wire upon flow of current. in the reverse direction.

l n testimony wher of, I hereunto set my hand.

WALTER V. TURN ER.

